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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36002 results found.

  1. GRB000301C - Addendum to GCN 623
  2. GRB000301C - R magnitude lower limit
  3. GRB 000323, optical observations
  4. GRB 000326: Optical Observations
  5. GRB000326, Radio observations
  6. GRB000326 [IPN Position]
  7. GRB 000307 optical observations
  8. GRB000323 [IPN Position]
  9. GRB000315 [IPN Positions]
  10. GRB 000313 - optical transient in the BATSE error box
  11. GRB000301C - B and R photometry
  12. GRB000301C - R photometry
  13. GRB 000307, Optical Observations
  14. GRB 000307, BVRI Field Photometry
  15. GRB 000301C: Optical Spectrum and Redshift
  16. GRB 000301C: Optical Spectrum and Redshift
  17. GRB 000301C: A Precise Redshift Determination
  18. GRB 000301C, Optical Observation
  19. GRB 000301C: HST/STIS-PRISM NUV-MAMA spectroscopy
  20. GRB 000301C: HST/STIS CCD Imaging of the field
  21. IPN error box for GRB000307
  22. GRB 000301c: K' observations
  23. GRB000301C, optical R-band observations
  24. GRB000301c - R photometry and nearby faint source confirmation
  25. GRB 000301C, Optical Observation
  26. GRB 000301c: K' observations
  27. GRB 000301C Optical Observations
  28. GRB 000301C: K' Observations
  29. GRB000301C - Host galaxy not detected in R (?)
  30. GRB000301C optical observations
  31. GRB 000301c near-IR observations
  32. GRB 000301C, Optical Color
  33. GRB000301C, Optical Spectroscopy
  34. GRB 000301C, UBVRI field photometry
  35. GRB 000301C, Optical Observation
  36. GRB000301C 250 GHz detection
  37. GRB 000301C R-band observation
  38. GRB 000301C, Optical Observation
  39. GRB000301C, near-infrared observations (JHK' photometry)
  40. GRB 000301C: OT confirmed
  41. GRB000301c optical observations
  42. GRB 000301A, Radio Observations
  43. GRB000301C, optical observations
  44. GRB000301c, near-infrared observations
  45. GRB000301C
  46. GRB 000301C : Optical Candidate
  47. GRB000301C: RXTE/ASM and IPN localizations
  48. GRB000226 [IPN Position]
  49. HST Observations of GRB 990712
  50. GRB 000214 near-IR observations
  51. GRB 000115 Optical observations
  52. GRB 000214, Radio Observations
  53. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  54. GRB 000115, BVRI field photometry
  55. IPN annulus for GRB000214
  56. BATSE GRB trigger criterion changed
  57. GRB000210 X-ray afterglow
  58. GRB000214: X-ray afterglow candidate
  59. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  60. GRB 000210: BATSE Observations
  61. Optical observations of the Chandra X-ray source for GRB000210
  62. Chandra Observations of GRB000210 X-ray Afterglow
  63. IPN triangulation of GRB000210
  64. GRB 000201: TAROT optical observations
  65. GRB 000131 Optical Observations
  66. GRB000126 Optical Observations
  67. BATSE GRB trigger criteria changed
  68. GRB 991208, radio observations
  69. BATSE+IPN location of GRB000131
  70. IPN localization of GRB000131
  71. GRB 000126, optical observations
  72. GRB000126, optical observations
  73. BATSE location of GRB000126
  74. IPN localization of GRB000126
  75. GRB 000115 Optical observations
  76. BATSE Observations of GRB000115
  77. Second RXTE Observation of GRB 000115
  78. GRB991216, UBVRIJHK field photometry
  79. Single IPN error box for GRB991229
  80. GRB 991216 VLBA Observations
  81. BEPPOSAX GRBM Localization of GRB991226
  82. IPN error boxes for GRB991229
  83. GRB 991216: J band spectrophotometry
  84. GRB 991216: Detection of the Host and/or Absorber Galaxy
  85. IPN localization of GRB991226
  86. Single IPN error box for GRB991221
  87. IPN error boxes for GRB991221
  88. GRB 991216 RXTE ASM Observations
  89. IPN error box for GRB991216
  90. GRB 991216: Updated BATSE parameters
  91. Lowell/Perkins observation of GRB 991216
  92. GRB 991217 (SAX J2303.2+0015) Optical observations
  93. Chandra observation of the X-ray afterglow of GRB991216
  94. GRB 991216, optical observations
  95. GRB 991216 Optical Observations
  96. GRB 991216 Optical spectroscopy/imaging
  97. K observations of GRB991216
  98. GRB 991217 (SAX J2303.2+0015) Optical observations
  99. GRB991216 Spectroscopy
  100. Lowell/Perkins observation of GRB 991216

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Download all Circulars as a .tar.gz archive (updated once a day):
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